/**
 * Copyright (c) 2010, Casey Lai
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation and/or
 * other materials provided with the distribution.
 * 
 * Neither the name of the Cheetah Group nor the names of its contributors may be
 * used to endorse or promote products derived from this software without specific
 * prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 */

package org.cheetahworkflow.designer.action;

import org.cheetahworkflow.designer.ui.WorkflowChartEditor;
import org.eclipse.gef.editparts.ZoomManager;
import org.eclipse.gef.ui.actions.ActionRegistry;
import org.eclipse.gef.ui.actions.ZoomComboContributionItem;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.IToolBarManager;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.action.Separator;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchActionConstants;
import org.eclipse.ui.actions.ActionFactory;
import org.eclipse.ui.part.MultiPageEditorActionBarContributor;
import org.eclipse.ui.texteditor.ITextEditorActionConstants;


public class MultiPageEditorContributor extends MultiPageEditorActionBarContributor {
	
	private IEditorPart activeEditorPart;
	
	private ActionRegistry registry;
	
	private Action verifyAction;
	
	public MultiPageEditorContributor() {
		super();
		createActions();
	}
	
    protected IAction getActionByEditor(String actionID) {
    	if (registry == null) {
    		return null;
    	} else {
    		return registry.getAction(actionID);
    	}
	}
    
    public IEditorPart getActivePage() {
    	return activeEditorPart;
    }
    
    public void setActivePage(IEditorPart part) {
		if (activeEditorPart == part)
			return;

		activeEditorPart = part;

		IActionBars actionBars = getActionBars();
		if (actionBars != null) {

			WorkflowChartEditor chartEditor = (part instanceof WorkflowChartEditor) ? (WorkflowChartEditor) part : null;
			if (chartEditor != null) {
				registry = (ActionRegistry) chartEditor.getAdapter(ActionRegistry.class);
				
				actionBars.setGlobalActionHandler(
					ActionFactory.DELETE.getId(),
					getActionByEditor(ITextEditorActionConstants.DELETE));
				actionBars.setGlobalActionHandler(
					ActionFactory.UNDO.getId(),
					getActionByEditor(ITextEditorActionConstants.UNDO));
				actionBars.setGlobalActionHandler(
					ActionFactory.REDO.getId(),
					getActionByEditor(ITextEditorActionConstants.REDO));
				actionBars.updateActionBars();
			}
		}
	}
    
	public void contributeToMenu(IMenuManager manager) {
		IMenuManager menu = new MenuManager("Wor&kflow");
		manager.prependToGroup(IWorkbenchActionConstants.MB_ADDITIONS, menu);
		menu.add(verifyAction);
	}
	
	public void contributeToToolBar(IToolBarManager manager) {
		manager.add(new Separator());
		manager.add(verifyAction);
		
		String[] zoomStrings = new String[] {ZoomManager.FIT_ALL, ZoomManager.FIT_HEIGHT, ZoomManager.FIT_WIDTH};
		manager.add(new ZoomComboContributionItem(getPage(), zoomStrings));

	}
	
	private void createActions() {
		verifyAction = new VerifyAction(this);
	}
}
